根据等比数列求和公式,算得的结果为127/128
这个简单!!128分之123
解:1/2+1/4+1/8+1/16+1/32+1/64+1/128 =3/4+1/8+1/16+1/32+1/64+1/128 =7/8+1/16+1/32+1/64+1/128 =15/16+1/32+1/64+1/128 =31/31+1/64+1/128 =63/64+1/128 =127/128。
???????、